Enguarde: Add Elan Touchpad to the wake sources

BUG=chrome-os-partner:28572
TEST=`emerge-enguarde chromeos-bsp-enguarde`

Change-Id: I842a0cfe29d1c3febdbe61799329d73663d4f1f8
Reviewed-on: https://chromium-review.googlesource.com/198570
Reviewed-by: Benson Leung <bleung@chromium.org>
Commit-Queue: Bernie Thompson <bhthompson@chromium.org>
Tested-by: Bernie Thompson <bhthompson@chromium.org>
(cherry picked from commit a4613649db0093f457880a2f9be3e3742c59cb03)
Reviewed-on: https://chromium-review.googlesource.com/199399
Reviewed-by: Bernie Thompson <bhthompson@chromium.org>
2 files changed